range rover 2005 nokia phone ecu module packed up put block in to isolate unit now the sytem starts up music satnav but only for 30 secs then turns off can any body shed any light to this prob

hi could any body help ive a range rover 2005 l322 entertainment system failed i bought plugs to isolate the modules in boot space found itwas the bluetooth phone module that was at fault left plug in sytem runs for 30 seconds then shuts down completly